Multiple headers are being sent when sending email via C# and IIS smtp

Question

I am sending emails via my C# application the way below

MailMessage mail = new MailMessage();
mail.To.Add(srEmail);
mail.From = new MailAddress("noreply@monstermmorpg.com", srSender);
mail.Subject = srEmailTitle;
mail.Body = srEmailBody;
mail.IsBodyHtml = true;
mail.SubjectEncoding = System.Text.Encoding.UTF8;
mail.BodyEncoding = System.Text.Encoding.UTF8;
SmtpClient smtp = new SmtpClient();
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.UseDefaultCredentials = true;
smtp.Host = "127.0.0.1";
smtp.Port = 25;
smtp.Send(mail);

I am using windows server 2008 R2 and IIS 7.5 but for mail service using IIS 6.0

Now the IIS config is the way below

enter image description here

I am not sure whether this problem caused by IIS or C# application so best to ask it. Thanks for the replays. The problem can be seen at the below i mean multiple received from headers

MIME-Version: 1.0
From: "MonsterMMORPG"
 <noreply@monstermmorpg.com>
To: mypersonalemail@hotmail.com
Date: 10 Mar 2012 16:20:03 +0000
Subject: =?utf-8?B?UG9rZW1vbkNyYWZ0IGRhaGEga2FsaXRlbGkgYmlyIG95dW4g?=
 =?utf-8?B?b2xhcmFrIGdlcmkgZMO2bmTDvC4gRXNraSBoZXNhYsSxbsSxeiBkdXJ1?=
 =?utf-8?B?eW9yLg==?=
Content-Type: text/html; charset=utf-8
Content-Transfer-Encoding: base64
Message-ID: <XCPV002DreBBsQwY6YH0004e7c9@noreply.monstermmorpg.com>

If you look carefully you will see there are 2 received from headers. I want to make it only single one. So basically removing the second received from header.

I am not sure but I think the Received here means the mail server that has processed this message as intermediates before your mail was received by the receiver. So this is just the way it is shown in the message header at the receiver. Why would you like to have only one of those??? — Dinesh, Mar 10 '12 at 16:41
Well i have fear that it would increase dropping spam box chance. — Furkan Gözükara, Mar 10 '12 at 17:03
Hardly. Many companies run emails through an internal mail server before it hits the internet. — TomTom, Mar 10 '12 at 20:43

score 2 · Accepted Answer · answered Mar 10 '12 at 16:43

2

Well, do not use the local SMTP server. Every SMTPP server is supposed to add itself to the list for tracking. I do not really understand at all why the heck you bother - this is standard behavior.

answered Mar 10 '12 at 16:43

TomTom

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Well i have fear that it would increase dropping spam box chance. – Furkan Gözükara Mar 10 '12 at 17:04

Multiple headers are being sent when sending email via C# and IIS smtp

1 Answers1